Bilingual srt read function implemented

Former-commit-id: 2ad5fe60da1e9dee426fc948b1de5628cac7fba5

src/srt_util/srt.py

@@ -50,7 +50,10 @@ class SrtSegment(object):
             self.start = int(start_list[0]) * 3600 + int(start_list[1]) * 60 + int(start_list[2]) + self.start_ms / 100
             end_list = self.end_time_str.split(',')[0].split(':')
             self.end = int(end_list[0]) * 3600 + int(end_list[1]) * 60 + int(end_list[2]) + self.end_ms / 100
-            self.translation = ""
+            if len(args[0]) < 5:
+                self.translation = ""
+            else:
+                self.translation = args[0][3]
 
     def merge_seg(self, seg):
         """
@@ -105,10 +108,16 @@ class SrtScript(object):
     def parse_from_srt_file(cls, path: str):
         with open(path, 'r', encoding="utf-8") as f:
             script_lines = [line.rstrip() for line in f.readlines()]
-
+        bilingual = False
+        if script_lines[2] != '' and script_lines[3] != '':
+            bilingual = True
         segments = []
-        for i in range(0, len(script_lines), 4):
-            segments.append(list(script_lines[i:i + 4]))
+        if bilingual:
+            for i in range(0, len(script_lines), 5):
+                segments.append(list(script_lines[i:i + 5]))
+        else:
+            for i in range(0, len(script_lines), 4):
+                segments.append(list(script_lines[i:i + 4]))
 
         return cls(segments)